EP0426068B1 - Verfahren zum Montieren von Reifen - Google Patents

Verfahren zum Montieren von Reifen Download PDF

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Publication number
EP0426068B1
EP0426068B1 EP90120701A EP90120701A EP0426068B1 EP 0426068 B1 EP0426068 B1 EP 0426068B1 EP 90120701 A EP90120701 A EP 90120701A EP 90120701 A EP90120701 A EP 90120701A EP 0426068 B1 EP0426068 B1 EP 0426068B1
Authority
EP
European Patent Office
Prior art keywords
tire
automobile
tires
grooves
sub
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Expired - Lifetime
Application number
EP90120701A
Other languages
English (en)
French (fr)
Other versions
EP0426068A3 (en
EP0426068A2 (de
Inventor
Kiyoshi Tomioka
Susumu Watanabe
Tuneo Morikawa
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Yokohama Rubber Co Ltd
Original Assignee
Yokohama Rubber Co Ltd
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Yokohama Rubber Co Ltd filed Critical Yokohama Rubber Co Ltd
Publication of EP0426068A2 publication Critical patent/EP0426068A2/de
Publication of EP0426068A3 publication Critical patent/EP0426068A3/en
Application granted granted Critical
Publication of EP0426068B1 publication Critical patent/EP0426068B1/de
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B60—VEHICLES IN GENERAL
    • B60C—VEHICLE TYRES; TYRE INFLATION; TYRE CHANGING; CONNECTING VALVES TO INFLATABLE ELASTIC BODIES IN GENERAL; DEVICES OR ARRANGEMENTS RELATED TO TYRES
    • B60C13/00—Tyre sidewalls; Protecting, decorating, marking, or the like, thereof
    • B60C13/001—Decorating, marking or the like
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B60—VEHICLES IN GENERAL
    • B60C—VEHICLE TYRES; TYRE INFLATION; TYRE CHANGING; CONNECTING VALVES TO INFLATABLE ELASTIC BODIES IN GENERAL; DEVICES OR ARRANGEMENTS RELATED TO TYRES
    • B60C19/00—Tyre parts or constructions not otherwise provided for
    • B60C19/001—Tyres requiring an asymmetric or a special mounting
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10S—TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10S152/00—Resilient tires and wheels
    • Y10S152/902—Non-directional tread pattern having no circumferential rib and having blocks defined by circumferential grooves and transverse grooves
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10S—TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10S152/00—Resilient tires and wheels
    • Y10S152/904—Specified tread pattern for front tire and rear tire

Definitions

  • the present invention relates to a method according to the preamble of the claim.
  • the inventors of the present invention made various studies on how to equally improve the above two performances, and found that it is when an automobile is run on a corner that the dry running and wet running driving stabilities are most evaluated, coming to make the present invention. Namely, when studying the functions of tires, the inventors did not consider a tire only, but intended to study and find the best functions exhibited while fitted to an automobile. In other words, the inventors intended to equally satisfy the above two performances by improving to a maximum extent a function of a tire that is considered most important in a certain condition.
  • tires having a tread pattern comprising blocks defined by a plurality of annular straight grooves formed within a ground-contacting width of a tread surface of the tire, extending over a whole circumference of the tire, and a plurality of sub-grooves extending in the width direction of the tire and intersecting said straight grooves, arranged at a same inclination relative to the tire circumferential direction.
  • An object of the invention is to improve the wet running performance with the same set of tires which is known from the above-mentioned document.
  • Each of four tires for performing the method according to the present invention has a tread pattern formed in the tread surface thereof by defining blocks by a plurality of annular straight grooves extending circumferentially in the tread surface of the tire within the ground-contacting width thereof around the tire and disposing also a plurality of sub-grooves intersecting obliquely those straight grooves extending parallely in the widthwise direction of the tire and has words "WET” and "DRY” with arrows thereunder marked on side walls on the serial side indicating the rotational directions of the tire.
  • the method of fitting the tires described above is characterized in that the directions indicated by the arrows under the "WET” and "DRY" are determined such that when the four tires are fitted to an automobile, imaginary lines extending respectively from the sub-grooves of the left- and right-hand side tires confronting each other in the widthwise direction of the automobile when viewed from thereabove intersect each other on the front side of the vehicle for the dry road running, while imaginary lines extending respectively from the sub-grooves of the left- and right-hand side tires intersect each other on the rear side of the automobile for the wet road running.
  • a pneumatic tire which can be used for the method according to the present invention is for example a pneumatic radial tire as shown in Fig. 1.
  • a carcass layer 2 is mounted on a pair of left and right bead cores 1, 1, and in a tread 3 two annular belt layers 4, 4 are disposed circumferentially around the tire in such a manner as to surround the outer circumference of the carcass layer 2.
  • Organic fibers such as of nylon and polyester are used as a material for the carcass layer 2, and highly strong and rigid cords such as steel cords, Aramid cords (aromatic polyamide fiber cords) or the like are used as cords for the belt layer 4.
  • highly strong and rigid cords such as steel cords, Aramid cords (aromatic polyamide fiber cords) or the like are used as cords for the belt layer 4.
  • a belt cover layer (not shown) comprising nylon cords may be disposed on the outside of the outer belt layer 4 with a view to improving the high-speed running performance.
  • the angle at which cords are disposed in this belt cover layer is substantially 0° (parallel) with respect to the circumferential direction of the tire.
  • a tread pattern is formed by defining blocks by a plurality of annular straight grooves circumferentially extending around the tire in the surface of the tread 3, i.e., a tread surface 5 of the tire within the ground-contacting width (within the range from one of the shoulder portions to the other shoulder portion) thereof, and by disposing also a plurality of sub-grooves obliquely intersecting those straight grooves in the tread surface 5 of the tire in the widthwise direction thereof.
  • Figs. 2 and 3 show, respectively, examples of the tread pattern of tires actually fitted to an automobile when viewed from above.
  • the reference numeral 1 denotes annular straight grooves provided in the circumferential direction EE′ of the tire
  • the reference numeral 3 denotes blocks defined by these grooves.
  • the sub-grooves 2 are disposed in such a manner as to direct obliquely to the left with respect to the direction M in which the automobile moves
  • the sub-grooves 2 are disposed in such a manner as to incline also diagonally but to the left with respect to the direction M in which the automobile moves.
  • the tread pattern shown in Fig. 2 is hereinafter referred to as tread pattern A
  • the tread pattern shown in Fig. 3 is hereinafter referred to as tread pattern B.
  • the direction in which cords are disposed in a belt layer closest to the tread surface 5 of the tire is inclined to the same direction in which the sub-grooves 2 are disposed with respect to the circumferential direction of the tire. This is because in a case where the sub-grooves and the cords of the outer belt layer 4 are declined in the same direction, the cords assist the sub-grooves 2 with rigidity and also serve to enhance the rigidity of the sub-grooves 2, improving the edge effect of the sub-grooves 2 to the road surface when running.
  • the sub-grooves 2 of the tires fitted on the left-hand side of the automobile improve the drainage of water towards the inside of the automobile (direction towards the right-hand side of the automobile)
  • the sub-grooves 2 of the tires fitted on the right-hand side of the automobile improve the drainage of water towards the inside of the automobile (direction towards the left-hand side of the automobile).
  • a plurality of annular straight grooves are also provided in the tread surfaces of the tires in the circumferential direction thereof, the tires exhibit far better draining capability. Therefore, it is possible to improve the wet running performance.
  • the pneumatic tires T for performing the method according to the present invention may be marked on the sidewall portion thereof with words "WET” and "DRY” and arrows thereunder indicating the rotational directions of the tire T so as to facilitate fitting the tire to the automobile.
  • the tire T is marked with the words and arrows on the sidewall surfaces on the outer side (generally called a serial side) of the automobile when the tires are fitted to the automobile.
  • the tires can be easily fitted to the automobile for dry running so that as shown in Fig. 9, the direction of the "DRY" arrow may be the same as the direction M in which the automobile moves, and that the sidewall so marked may be on the outer side of the automobile.
  • the tires can be easily fitted to the automobile so that the direction of the "WET" arrows may be the same as the direction M, as shown in Fig. 8, in which the automobile runs and that the sidewall so marked may be on the outer side of the vehicle.
  • Fig. 7 shows one example of a conventional tread pattern of a tire which is fitted to an automobile when viewed from above an automobile.
  • wave-shaped sub-grooves 2 neutral pattern
  • these sub-grooves 2 are not arranged such that they are tilted downwardly towards the left- or right-hand side with respect to the direction M in which the automobile moves.
  • the tread pattern shown in Fig. 6 is hereinafter referred to as tread pattern C.
  • Tires having this tread pattern C are fitted to the vehicle as shown in Fig. 7.
  • conventionally tires having neutral patterns are used so that the difference in the cornering force between a left turn and a right turn is made as small as possible.
  • every tire shows the same performance in any conditions. Due to this, it has not been possible to equally improve the dry running performance and the wet running performance as in the case of the present invention.
  • the automobiles were driven on a circular course with a radius of 100 m having a certain wet area with a water depth of 5 mm.
  • the speeds of the automobiles were gradually increased and lateral accelerations in the wet area were measured.
  • the results are shown in the form of index, taking the results of Automobile V as 100 (greater indexes show better results).
  • Automobiles I and III are superior to Automobile V in regard to the dry running performance and that Automobiles II and IV are superior to Automobile V in regard to the wet running performance.
  • the present invention since imaginary lines extending respectively from the sub-grooves of the left- and right-hand side tires of the same axle are made to intersect each other on the front side of the automobile for the dry road running, while those imaginary lines are made to intersect each other on the rear side of the automobile for the wet road running, not only the dry running performance but also the wet running performance can be sufficiently improved.
  • the present invention is suitable for fitting pneumatic radial tires.

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Tires In General (AREA)

Claims (1)

  1. Verfahren zum Aufziehen von Luftreifen, bei welchem beim Aufziehen auf der linken und rechten Seite eines Kraftfahrzeugs Reifen mit einem Profil, das Blöcke umfaßt, die von einer Mehrzahl von ringförmigen geraden Rillen, welche innerhalb einer den Boden berührenden Breite einer Lauffläche des Reifens ausgebildet sind, wobei sie sich über einen gesamten Umfang des Reifens erstrecken, sowie von einer Mehrzahl von in der Breitenrichtung des Reifens verlaufenden und die besagten geraden Rillen kreuzenden Nebenrillen 2 begrenzt werden, welche unter einer gleichen Neigung bezüglich der Reifenumfangsrichtung angeordnet sind, derart aufgezogen werden, daß sich gedachte Linien, die sich jeweils aus den besagten Nebenrillen der einander in der Breitenrichtung des besagten Kraftfahrzeugs gegenüberliegenden linken und rechten Reifen erstrecken, bei Betrachtung von oberhalb desselben auf der Vorderseite des besagten Kraftfahrzeugs kreuzen, dadurch gekennzeichnet, daß die besagten Reifen derart aufgezogen werden, daß sich die besagten gedachten Linien für eine Fahrt auf nasser Straße auf der Rückseite des Kraftfahrzeugs kreuzen.
EP90120701A 1989-10-30 1990-10-29 Verfahren zum Montieren von Reifen Expired - Lifetime EP0426068B1 (de)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
JP1279777A JPH03143706A (ja) 1989-10-30 1989-10-30 空気入りタイヤの装着方法
JP279777/89 1989-10-30

Publications (3)

Publication Number Publication Date
EP0426068A2 EP0426068A2 (de) 1991-05-08
EP0426068A3 EP0426068A3 (en) 1991-11-06
EP0426068B1 true EP0426068B1 (de) 1995-06-21

Family

ID=17615777

Family Applications (1)

Application Number Title Priority Date Filing Date
EP90120701A Expired - Lifetime EP0426068B1 (de) 1989-10-30 1990-10-29 Verfahren zum Montieren von Reifen

Country Status (4)

Country Link
US (1) US5211779A (de)
EP (1) EP0426068B1 (de)
JP (1) JPH03143706A (de)
DE (1) DE69020304T2 (de)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0906837A2 (de) * 1997-10-03 1999-04-07 Sumitomo Rubber Industries Ltd. Fahrzeugreifen

Families Citing this family (12)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2692201A1 (fr) * 1992-06-11 1993-12-17 Michelin & Cie Train de pneumatiques à sculptures directionnelles.
USD382521S (en) * 1995-11-08 1997-08-19 The Goodyear Tire & Rubber Company Tire tread
DE19548731C2 (de) * 1995-12-23 2001-09-27 Continental Ag Radialreifen
US5980668A (en) * 1996-06-10 1999-11-09 Kumho & Co, Inc Tire with rotation time tread wear indicator
JP3714761B2 (ja) * 1997-03-18 2005-11-09 株式会社ブリヂストン 空気入りタイヤ
JP3363370B2 (ja) * 1998-02-12 2003-01-08 住友ゴム工業株式会社 空気入りタイヤ
AU4682299A (en) * 1999-06-14 2001-01-02 Goodyear Tire And Rubber Company, The Method of mounting tires for vehicle steering prestressing
CN100398345C (zh) * 2002-11-26 2008-07-02 横滨橡胶株式会社 充气轮胎
AU2004224179B2 (en) * 2003-03-25 2010-04-22 Michelin Recherche Et Technique S.A. Method of mounting tyres to civil engineering vehicles and associated tyre
US20050224153A1 (en) * 2004-04-12 2005-10-13 Al Speyer Use of colored indicia on tires as a designator
US20140138006A1 (en) * 2012-11-22 2014-05-22 Toyo Tire & Rubber Co., Ltd. Pneumatic tire and manufacturing method of the same
EP3590731B1 (de) * 2012-12-19 2021-04-14 Bridgestone Americas Tire Operations, LLC Reifen mit bidirektionaler leistung

Family Cites Families (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR430344A (fr) * 1911-05-31 1911-10-13 Ellwood Lee Company J Perfectionnement aux bandages pneumatiques
NL43143C (de) * 1935-03-13
FR2157211A7 (de) * 1971-10-21 1973-06-01 Kleber Colombes
GB8505424D0 (en) * 1985-03-02 1985-04-03 Sp Tyres Uk Ltd Tyre
US4732194A (en) * 1986-04-17 1988-03-22 The Yokohama Rubber Co., Ltd. Asymmetric tire and tread
JPS6313802A (ja) * 1986-07-04 1988-01-21 Yokohama Rubber Co Ltd:The ラジアルタイヤ
JP2610876B2 (ja) * 1987-05-31 1997-05-14 東洋ゴム工業株式会社 自動車用タイヤの装着法
US4877072A (en) * 1987-12-17 1989-10-31 The Goodyear Tire & Rubber Company Tread for left and right vehicle tires

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0906837A2 (de) * 1997-10-03 1999-04-07 Sumitomo Rubber Industries Ltd. Fahrzeugreifen
EP0906837A3 (de) * 1997-10-03 2000-10-25 Sumitomo Rubber Industries Ltd. Fahrzeugreifen

Also Published As

Publication number Publication date
JPH03143706A (ja) 1991-06-19
EP0426068A3 (en) 1991-11-06
EP0426068A2 (de) 1991-05-08
US5211779A (en) 1993-05-18
DE69020304D1 (de) 1995-07-27
DE69020304T2 (de) 1996-01-11

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